Please run:

import java.beans.BeanInfo;
import java.beans.BeanProperty;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.util.Iterator;

public class Test {
    
    public class C {
        
        private int value;

        @BeanProperty(
                bound = true,
                expert = true,
                hidden = true,
                preferred = true,
                required = true,
                visualUpdate = true,
                description = "OTHER",
                enumerationValues = {"javax.swing.SwingConstants.EAST"}
                )
        public void setValue(int v) { value = v; }
        public int getValue() { return value; }
    }
    
    public static void main(String[] args) throws IntrospectionException {
        
        BeanInfo i = Introspector.getBeanInfo(C.class, Object.class);
        PropertyDescriptor d = i.getPropertyDescriptors()[0];

        Iterator<String> it = d.attributeNames().asIterator();
        while (it.hasNext()) {
            String key = it.next();
            System.out.println(key + ": " + d.getValue(key));
        }
        
        System.out.println("---");
        System.out.println(d.isExpert());
        System.out.println(d.isHidden());
    }
}

Output (JDK9 b72, Win 7):

expert: true
visualUpdate: true
hidden: true
enumerationValues: [Ljava.lang.Object;@3ada9e37
---
true
true

So:
1. the "required" info is lost (we do not have d.isRequired() and d.getValue("required") is obviously null)
2. the "expert" and "hidden" info is duplicated